<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
     <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
     <el-breadcrumb-item>权限管理</el-breadcrumb-item>
     <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
       <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
          <el-row :class=" ['bdbottom', i1 === 0 ? 'bdtop': '' ,'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeright(scope.row, item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <!-- 通过for循环嵌套渲染二级权限 -->
              <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeright(scope.row, item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeright(scope.row, item3.id)">{{item3.authName}}</el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
          <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
          <el-button type="warning" icon="el-icon-setting" size="mini" @click="showsetright(scope.row)">分配权限</el-button>
          </template>
          </el-table-column>
        </el-table>
    </el-card>

    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setrightdialog"
      width="50%" @close="setrightclosed">
      <!-- 树形控件 -->
      <el-tree :data="rightlist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotright">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
    //   所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示隐藏
      setrightdialog: false,
      // 所有权限的数据
      rightlist: [],
      // 树形控件绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数据
      defkeys: [],
      // 当前即将分配权限的角色ID
      roleId: ''
    }
  },
  created () {
    this.getrolelist()
  },
  methods: {
    // 获取所有角色的列表
    async getrolelist () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
    },
    // 根据ID删除对应权限
    async removeright (role, rightid) {
      const confirmres = await this.$confirm('此操作将永久删除该文件,是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmres !== 'confirm') {
        return this.$message.info('取消了删除！')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightid}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    async showsetright (role) {
      this.roleId = role.id
      // 获取所有权限的数据
      // console.log(role)
      try {
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) {
          return this.$message.error('获取权限数据失败！')
        }
        this.rightlist = res.data
        // 递归获取三级节点的id
        this.getleafkeys(role, this.defkeys)
        // console.log(this)
        this.setrightdialog = true
      } catch (err) {
        console.log(err)
      }
    },
    // 通过递归的形式，获取角色下所有三级权限的ID 并保存到defkeys中
    getleafkeys (node, arr) {
      // console.log(node.children)
      // 如果当前node节点不包括children属性则是3级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getleafkeys(item, arr))
    },
    // 监听权限对话框的关闭事件
    setrightclosed () {
      this.defkeys = []
    },
    // 点击为角色分配权限
    async allotright () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idstr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idstr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功！')
      this.getrolelist()
      this.setrightdialog = false
    }
  }
}

</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
